Aluminum earbuds feature an in-ear design for convenience. 3.5mm plug features aluminum housing and fits a variety of devices so you can plug into music and more. Design also includes 10mm driver unit, 32 OHM impedance, 10MW maximum input, 119 +/- 3dB sensitivity, 20-20,000Hz frequency response and a 47" cord. Earbuds include two additional sets of replacement buds.